What is the Least Common Multiple of 20181 and 20191?

Least common multiple or lowest common denominator (lcd) can be calculated in two way; with the LCM formula calculation of greatest common factor (GCF), or multiplying the prime factors with the highest exponent factor.

Least Common Multiple of 20181 and 20191 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 20181 and 20191, than apply into the LCM equation.

GCF(20181,20191) = 1
LCM(20181,20191) = ( 20181 × 20191) / 1
LCM(20181,20191) = 407474571 / 1
LCM(20181,20191) = 407474571

Least Common Multiple (LCM) of 20181 and 20191 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 20181 and 20191. First we will calculate the prime factors of 20181 and 20191.

Prime Factorization of 20181

Prime Factorization of 20191

Now multiplying the highest exponent prime factors to calculate the LCM of 20181 and 20191.

LCM(20181,20191) = 3¹ × 7¹ × 31² × 61¹ × 331¹
LCM(20181,20191) = 407474571